Secret refuge and museum of the Duke of Florence.

The walls and streets of the ancient city are peppered with penises.

Erotic art covers the walls of the largest ancient pleasure palace.

The last moments of the ill-fated Pompeiians, frozen forever in plaster.

The Italian revolutionary's legendary wife is portrayed on horseback waving a gun and holding her child in this memorial on the Janiculum.

Breathtaking and huge 430 year old maps of Italy.

Historic fortifications form the boundary of Vatican City, but it’s not entirely surrounded by walls.

Frida Kahlo's childhood home, now a museum of her life and works.

The most complete statue of this Aztec god sits a top a throne carved with images of hallucinogenic plants.

A towering monument in Spain has proven to be more labor-intensive than initially planned.

This little sun pays homage to a massive gate that once stood at this location.

These magnificent city walls rise from the barren sun-baked Spanish plains like something straight out of a fairytale.

The facade of this 16th-century building is decorated with carvings of 300 seashells.

Thousands of coffin-like pillars make up this controversial Holocaust memorial.

These bronze pamphlets remember a remarkable group of Germans who fearlessly opposed the Nazis in the very center of their power.

Go surfing on this urban wave, "hacked" by local surfers.

Golden cobblestones remember a time when this small alley was used to avoid having to give a Nazi salute.

A fearsome dragon clings to a corner of Munich's city hall.

A focal point of the Cuban government, this city square features one of the most iconic images in the country.

A colorful narrow alley in Cuba is full of street art and sculptures made of found objects.

This statue in Plaza San Francisco commemorates a beloved figure from 1950s Havana.

No one knows the meaning behind this giant sculpture of a nude woman with a fork riding a rooster in Havana.

The house that birthed The Old Man and The Sea is now a museum devoted to the old man who wrote it.

Where Saint-Martin ends and Sint Maarten begins (or vice versa).